CA2019000A1 - Cellular telephone responsive to service availability for operating on different cellular telephone systems - Google Patents
Cellular telephone responsive to service availability for operating on different cellular telephone systemsInfo
- Publication number
- CA2019000A1 CA2019000A1 CA2019000A CA2019000A CA2019000A1 CA 2019000 A1 CA2019000 A1 CA 2019000A1 CA 2019000 A CA2019000 A CA 2019000A CA 2019000 A CA2019000 A CA 2019000A CA 2019000 A1 CA2019000 A1 CA 2019000A1
- Authority
- CA
- Canada
- Prior art keywords
- cellular telephone
- operating
- dual
- responsive
- service availability
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
CELLULAR TELEPHONE RESPONSIVE TO
SERVICE AVAILABILITY FOR OPERATING
ON DIFFERENT CELLULAR TELEPHONE SYSTEMS
Abstract of the Disclosure A unique dual-system cellular telephone includes a transceiver (100) having a dual bandwidth receiver, an audio/logic unit (200) having dual control programs, and a handset unit (300). The dual bandwidth receiver of the transceiver (100) has different filters (408 and 410) in the intermediate frequency section thereof which are switchably selected depending on which cellular telephone system is available. When service is not available in one of the cellular telephone systems, the unique cellular telephone automatically switches the receiver bandwidth and control program for operating on the other cellular telephone system.
SERVICE AVAILABILITY FOR OPERATING
ON DIFFERENT CELLULAR TELEPHONE SYSTEMS
Abstract of the Disclosure A unique dual-system cellular telephone includes a transceiver (100) having a dual bandwidth receiver, an audio/logic unit (200) having dual control programs, and a handset unit (300). The dual bandwidth receiver of the transceiver (100) has different filters (408 and 410) in the intermediate frequency section thereof which are switchably selected depending on which cellular telephone system is available. When service is not available in one of the cellular telephone systems, the unique cellular telephone automatically switches the receiver bandwidth and control program for operating on the other cellular telephone system.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US37067589A | 1989-06-23 | 1989-06-23 | |
US370,675 | 1989-06-23 | ||
US511,882 | 1990-04-20 | ||
US07/511,882 US5008925A (en) | 1989-12-20 | 1990-04-20 | Cellular telephone responsive to service availability for operating on different cellular telephone systems |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2019000A1 true CA2019000A1 (en) | 1990-12-23 |
CA2019000C CA2019000C (en) | 1993-06-22 |
Family
ID=27005048
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002019000A Expired - Lifetime CA2019000C (en) | 1989-06-23 | 1990-06-14 | Cellular telephone responsive to service availability for operating on different cellular telephone systems |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2699617B2 (en) |
CA (1) | CA2019000C (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6606485B1 (en) * | 1999-10-06 | 2003-08-12 | Qualcomm, Incorporated | Candidate system search and soft handoff between frequencies in a multi-carrier mobile communication system |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58151136A (en) * | 1982-03-04 | 1983-09-08 | Nec Corp | Mobile radio communication system |
-
1990
- 1990-06-14 CA CA002019000A patent/CA2019000C/en not_active Expired - Lifetime
- 1990-06-22 JP JP2162986A patent/JP2699617B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2699617B2 (en) | 1998-01-19 |
JPH0335628A (en) | 1991-02-15 |
CA2019000C (en) | 1993-06-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry | ||
MKEX | Expiry |
Effective date: 20100614 |